Polytaenium lineatum (Sw.) J.Sm.

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Pteridaceae

  • Scientific Name

    Polytaenium lineatum (Sw.) J.Sm.

  • Description

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    Species Description - Rhizomes short-creeping; rhizome scales lanceolate, 3–4 x 0.6– 0.8 mm; fronds 6–30(–43) cm long, clumped; stipes alate, lightcolored, no darker than surrounding tissue; blades coriaceous or subcoriaceous, narrowly elliptic, 0.5–1(–1.5) mm wide, midribs stramineous to light green, not very evident; veins obscure, netted, those along blade margins also forming areoles; sporangia (sori) sunken in (1–)2–4 x straight parallel rows on each side of the midvein; spores pale yellowish, hyaline; 2n=120 (Jam.).

  • Discussion

    Hemionitis lineata Sw., Prodr. 129. 1788. Vittaria lanceolata Sw., Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 2: 133. 1799, non Vittaria lineata (L.) Sm., 1793. Antrophyum lineatum (Sw.) Kaulf., Enum. Filic. 199. 1824. Polytaenium lanceolatum (Sw.) Desv., Me´m. Soc. Linn. Paris 6: 218. 1827. Type. Jamaica. Swartz s.n. (presumably S; isotype B-Willd. 20033!, photo GH!, microfiche UC!).

    The parallel soral lines, usually in 4–6 rows, distinguish P. lineatum from congeners in Mexico.

  • Distribution

    Epiphytic in wet forests of Atlantic and Pacific slopes, montane rain forests, montane cloud forests; 800–1600(– 2000) m. Mexico; Guat, CR, Pan; Gr Ant; Col, Ven, Trin, Ec, Peru, s Braz, Bol, nw Arg.

    Mexico North America| Argentina South America| Bolivia South America| Brazil South America| Peru South America| Amazonas Ecuador South America| Trinidad and Tobago South America| Venezuela South America| Colombia South America| Panama Central America| Costa Rica South America| Guatemala Central America|